Whether you are trying to stay warm out on the stream or just looking to layer up, the Simms' ExStream Jacket is for you. It offers maximum warmth at a minimum weight with PrimaLoft® Silver Thermoplume Blowable 120g Insulation (body), 100g (Sleeves and hood). Other features of this piece include collared full-zip front, stretch woven zippered chest pocket, zippered handwarmer pockets, and a low-profile stretch elastic-bound cuff.